Coupling-joint for pipe-sections.



i To all whom it may concern.-

UNITED STATES "PATENT OFFICE.

COUPLING-JOINT FOR PIPE-SECTIONS.

Be it known that I, IRE E SCHAAD, a citi- 'zen of Switzerland, residing at Lucerne, Switzerland, have invented certain new and useful Improvements in Coupling-Joints for Pipe- Sections, of which the following is a specification.

The invention relates to improvements in coupling-joints for pipe-sections and it consists in the novel features and combinations of parts hereinafter described, and particularly pointed out in the claims.

The invention consists in a novel construction of flanges secured to the adjoining ends of the pipe-sections and forming between their inner adjacent portions an annular recess. which is cone-shaped in crosssection and holds a correspondingly-shaped packingring, of rubber or other suitable material, and a metal ring or hoop set within inner annular recesses formed in said flanges, said ring or hoop engaging the inner periphery of the packing-ring and retaining the latter in place, but not entirely filling said recesses; The said metal ring or hoop will preferably be formed of segments hinged together, the two end se ments of the series being preferably secure together by a plate and screws or bolts.

The object of the invention is toproduce a liquid-tight joint between the connected ends of pipe-sections and one which shall be capable of resisting the effects of high liquid pressures.

My invention is not limited to use in connection with any special pipe-lines, but is particularly applicable for use in hydraulic pipe-lines through which the water is forced under pressure.

In accordance with my invention the inner metal ringor hoop does not completely fill the recesses which receive it,- and hence the waterpressure may exert lateral pressure against the base of thepacking-iing and operate to force said ring tightly against the outwardlyconverging faces of the packing-recess, whereby said packing is caused to form a liquid tight joint.

The invention will be fully understood from the detailed description hereinafter presented, referencebeing had to the accompany ing drawings, in which Figure 1. is a longitudinal section through a portion of the adjacent ends of two ipe-sections connected together by a coup ing con- Specification of Letters Patent.

\ Application filed January 14, 1906. Serial No. 241,018.

Patented Feb. 27, 1906.

structed accordance with and embodying my invention; and Fig. 2 is a detached side elevation of the inner metal ring, shown as shaped in cross-section and adapted to receive a correspondingly shaped or com ressed packing-ring H, which completely ls 'the recess and extends slightly out of the broad base thereof, the said packing-ring being slightly deeper than said cone-shaped recess. other and are formed horizontally in the inner ad'acent edges of the flanges C D at the base of the recesses F,;and when said flanges are brought together said recesses G form an annular recess or groove adapted to receive the inner metal ring or loop I, having plain surfaces and at its outer periphery engaging the broad base of the packingring H, said ring I being broader than said ring H, but not as broad as the width of the recesses G. The metal ring or hoop I does not at its outer periphery engage the inner horizontal suraces of the recesses G, and hence the li uid flowing under pressure through the pipeine may ass within said recesses G and exert latera pressure against the opposite sides of the base of the packing-ring H, whereby said ring H will be pressed the more securely against the converging walls of the recesses F and leakage at the joint be prevented.

The metal ring I maintains the packing: ring H in place under all conditions, and this rin may be inone integral piece, but is prefera 1y composed of a series of segments connected together by hinges J, the meeting ends of'the two end segments being detachably secured together by a plate K and screws L. When the ring I is formed of the segments or in sections, it may be removed and replaced at any time when the pipe-sections are large enou h to admit a workman without removing t e bolts E, and at any time it will be The recesses G correspond with eachfound to be more convenient in applying and securing the packing to form the ring I in sections.

What I claim as m invention, and desire to secure by Letters atent, is

1. The coupling for the ad'acent ends of pipe-sections comprising the anges secured to said ends andhaving in their inner adj oin- -ing edges the recesses .F, G, combined with the packing H in therecesses F, and the metal ring'I in the recesses G and engaging the inner' surface of said packing, said rin not completely filling said recesses G, an said packing projecting from the recesses F into said recesses G; substantially as set forth.

2. The coupling for the ad'acent ends of pipe-sections comprising the anges secured to said ends and having in their inner adj oining edges the recesses F, G, combined with the packing H in the recesses F, and the metal ring'.I in the recesses G and engaging the inner surface of said acking, said recesses F when brou ht toget er forming an annular recess whicli is cone-sha ed in cross-section; "substantially as set forth.

3. The coupling for the adjacent ends of ner surface of said packing, said rin I being formed of segments connected toget er; sub stantially as set forth.

4. The coupling for the adjacent ehds of pipe-sections comprising the flanges secured to said ends and having in their inner adjoining ed es the recesses F, G, combined with the pac ing H in the recesses F, and the metal ring I in the recesses G and engaging the inner surface of said packing, said ring I being composed of segments hinged together and the adjoining ends of the end segments being secured together by a plate and screws; substantiall as set forth.

Signe at Lucerne, Switzerland, this 28th day of December, 1904.

IRENE SOHAAD.

Witnesses HENRY H. MORGAN, VITAL FAUER. 

